This bipedal robot has a flying head

Making a bipedal robot is hard. You have to make sure maintain exquisite balance at all times and, even with the amazing things Atlas can do, there is still a chance that your crazy robot will fall over and bop its electronic head. But what if that head is a quadcopter?
University of Tokyo have done just that with their wild Aerial-Biped. The robot isn’t completely bipedal but it’s designed instead to act like a bipedal robot without the tricky issue of being truly bipedal. Think of